18690020

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{337}}^1$

素因数の和:452

約数の個数: 48

約数和(自身を含む): 40884480

約数和(自身を除く): 22194460

約数列:

[1, 2, 4, 5, 10, 20, 47, 59, 94, 118, 188, 235, 236, 295, 337, 470, 590, 674, 940, 1180, 1348, 1685, 2773, 3370, 5546, 6740, 11092, 13865, 15839, 19883, 27730, 31678, 39766, 55460, 63356, 79195, 79532, 99415, 158390, 198830, 316780, 397660, 934501, 1869002, 3738004, 4672505, 9345010, 18690020]

約数ペア:

[(1, 18690020), (2, 9345010), (4, 4672505), (5, 3738004), (10, 1869002), (20, 934501), (47, 397660), (59, 316780), (94, 198830), (118, 158390), (188, 99415), (235, 79532), (236, 79195), (295, 63356), (337, 55460), (470, 39766), (590, 31678), (674, 27730), (940, 19883), (1180, 15839), (1348, 13865), (1685, 11092), (2773, 6740), (3370, 5546)]